subject: Energy-Efficient House—How to Change the House to Be Low-Carbon [print this page] Energy-Efficient HouseHow to Change the House to Be Low-Carbon
Buildings are the largest energy and resource consumption source. Its energy consumption accounts for 28 percent of the total energy consumption. Like carbon dioxide emission, 40 percent of them come from buildings. Copenhagen is far away from us but it is close to us in some aspects. Protecting the Earth, we need to know:
The interior temperature should be kept at 20 to 26, and the humidity should be maintained at 30% to 70% throughout a year. For most people, it may consume more energy to achieve this goal. Actually, scientific and reasonable interior layout and low-carbon, environmentally friendly home decorating materials can not only reduce energy consumption of buildings, but also make it be comfortable to live in.
Buildings that its window area is less than 70 % of the wall area have the best ventilation. Now, high quality living conditions should have natural ventilation and natural lighting which brings a higher requirement for doors and windows in energy saving. Full use of natural conditions can help us achieve buildings' inner energy saving.
Generally speaking, better ventilating building has the following features. The window's area is no more than 70% of that of the wall. The transparent part's area in the roof should not exceed 20% of the total roof area. If the window is too small, it can not meet the lighting requirement. In the opposite, if it is too large, it will bring the building big pressure to against excessive sun light in summer. And, if the window area is less than 40%, it will probably affect building's lighting. However, if the design area of the window can not beyond 40%, it is better to use traditional transparent glass to improve lighting condition.
Except the requirements for windows, the requirements for electrical lighting system's energy consumption are also important. 5.5 watts per square meter is considered as the most energy efficient lighting system.
Electrical lighting's energy consumption accounts for a large proportion in that of public buildings'. Therefore, it is more energy-efficient to use low power lamps in the rooms. But, different rooms have different purpose and require different lights. The arrangement and design of those bubbles are varied. But the purpose for bubble's using should contain good lighting effect as well as maximum energy efficiency.
The perfect power supply of lamps in common offices, classrooms, reading rooms, laboratories, and etc. is 5.5 watts per square meter. As for the wards where the patients need adequate rest, the lamps' power there only needs 3 watts per square meter. In the supermarket, the light power should keep at 10 watts per square meter for it is convenient for customers to select products. Therefore, in order to saving power, LED lights are used in many places.
In addition, the lamp's switch design is also contributes to energy saving. For example, the lamps which are by the side of wall and windows should be controlled by individual switch. Since those lamps do not need to be opened if the natural lights is well. But, the control for lamps in the passage and stairwell should be centralized. Because of the large quantity of such lamps, it is more energy efficient to use unified switches.
Energy efficiency is one of the major themes of this century. It is not only good for the Earth protection but healthy for our living environment to use low power lighting system, and also to arrange the inner layout in natural and environmental friendly way.
